CVE-2026-57999: luci-app-tailscale-community - Command Injection via tailscale.do_login RPC

Severity: high (CVSS 8.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.5% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-06-29 · updated 2026-10-25
Weakness: CWE-78

Description

luci-app-tailscale-community contains a command injection vulnerability in the tailscale.do_login RPC method that allows authenticated users to execute arbitrary commands as root. The vulnerability exists because user-controlled loginserver and loginserver_authkey parameters are improperly quoted within a double-quoted shell command, allowing shell substitutions like $() to be evaluated by the outer shell before argument processing.

Affected products

openwrt luci-app-tailscale-community: through 0.11.1

References

https://github.com/openwrt/luci/security/advisories/GHSA-xwc5-mx58-rh35
https://www.vulncheck.com/advisories/luci-app-tailscale-community-command-injection-via-tailscale-do-login-rpc
https://github.com/openwrt/luci/security/advisories/GHSA-xwc5-mx58-rh35

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